Thread: Executing commands throws an InterruptedException even with waitFor()

Hi forum,

Please help me. I've been searching for hours for what is wrong and I can safely say im lost

Here is my code:

protected Collection<String> executeCommand(String cmd) {
		//Result of the command output
		Collection<String> resultString = new ArrayList<String>();
 
		try
		{   // Execute command 
			Runtime rt = Runtime.getRuntime();
			Process proc = rt.exec(cmd);
 
			logger.debug("cmd: " + cmd);
 
                       // Class to do outputting...
			StreamGobbler errorGobbler = new 
			StreamGobbler(proc.getErrorStream(), "ERROR");            
 
			// any output?
			StreamGobbler outputGobbler = new 
			StreamGobbler(proc.getInputStream(), "OUTPUT");
 
			// kick them off
			errorGobbler.start();
			outputGobbler.start();
 
			// any error???
			int exitVal = proc.waitFor();
			logger.debug("Exit status: " + exitVal);
 
		} catch (Throwable t)
		{
			t.printStackTrace();
		}
		return resultString;
	}

and...

class StreamGobbler extends Thread
	{
		InputStream is;
		String type;
 
		StreamGobbler(InputStream is, String type)
		{
			this.is = is;
			this.type = type;
		}
 
		public void run()
		{
			try
			{   logger.debug("in run");
				InputStreamReader isr = new InputStreamReader(is);
				BufferedReader br = new BufferedReader(isr);
				String line=null;
				while ( (line = br.readLine()) != null)
					logger.debug(type + ">" + line);    
			} catch (IOException ioe)
			{
				ioe.printStackTrace();  
			}
		}
	}

This is the error i get:

java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Unknown Source)
at java.lang.UNIXProcess.waitFor(Unknown Source)
at gsoa.rim.CommunicationsCheck.executeCommand(Commun icationsCheck.java:177)

which points to the .waitFor() function call...

Why would it get interrupted if we are asking it to wait until its done?

Pleaasee help!